Two years ago, an overweight Sandoval appeared in only six of the Giants' 15 postseason games and hit .176 (3-for-17).
"His confidence was down," manager Bruce Bochy said. "I think he was lost at the plate."
As the Giants marched to their World Series conquest, Mike Fontenot and Juan Uribe siphoned playing time from Sandoval. Now, Bochy wouldn't think of benching him.
"We had a little more coverage in 2010 with the offense. This year he's needed," Bochy said. "He's really delivered for us, too, and played great. His confidence is so much higher at this point than what it was in 2010."
Bochy also noted that Sandoval, 26, appears to have matured.
"He still has a lot of fun, but I think he's more serious than he was before," Bochy said. "I think he's grown as a person and as a player."